I've installed windows 7 bootcamp 4 times now. I have some clever tricks to help you all. There are some problems that lie ahead few have encountered.
First issue - if you are using an expired version of NTFS Paragon, you can't delete the applessd.sys file. OSX won't let you do it. So what do you do? Either buy the full version which is crap cause all they're doing for you is hacking your own system privileges. Shouldn't have to pay for that right?
SOLUTION - Do what I did the 4th time around. And it went something like this.
1. Search Apple support for the Bootcamp drivers relevant to your machine and download. If your machine is MBP 15", so download the bootcamp drivers for that and keep on your computer for later.
2. Using Bootcamp assistant run through all the steps normally. Make sure your USB stick is always on the left side of your laptop, not the right. After Bootcamp has formatted your USB stick, and downloaded the support software, it will want to restart, don't let it restart.
3. After you stopped the restart, open finder and locate your bootcamp usb folder.
4. Merely replace bootcamp files with the ones you downloaded directly from Apple's websites. Do this because for some reason Bootcamp downloads the wrong drivers. It's messed up. So if you want something done right, you do it yourself. While you are replacing the files you will see the applessd.sys file in the bootcamp folder (you don't have to delete it but you can if you want, it will work either way, no worries). Doing it this way will also insure your keyboard and bluetooth mouse work at the time of install, which is a problem you may yet run into.
